By-pass valve



Filed Oct. 21, 1927 I INVENTOR.

Patented 0a. 9, 1928.

UNITEDFSTATES PATEN EDWARD MULLER, OF NORTH BERGEMNEW JERSEY.

IBY-IE'ASS VALVE.

Application filed Gotober 2 The objects of this invention are to pro- I vide a bypass valve, such as for pumps and advantages and results as may be brought out by the following description; I Referring to the accompanylng drawings, in which like characters of reference 1I1Cl1- cate the same -parts throughout the several views, Y

Figure 1 is a central longitudinal section of a by-pass valve of my improved con struction, showing it closed;

Figure 2 is a similar view showing the position of certain parts when the valve is partially closed Figure 3 is a plan of the value, and Figure 4 is a cross-section on line 4-4 of In the specific embodiment of, the invention shown in said drawings, the valve body 1 has inlet and outlet passages, 2 and 3 respectively, separated by a diaphragm or partition 4 through which is a valve opening disposed in a plane at substantially right 0 angles to theplanes of the inlet and outlet passages 2 and 3 and having at the inlet side thereof a valve seat 6 with which cooperates a. valve head 7 carried by a stem8, which at the inlet side of the seat 6 projects from the valve body 1 and is slidably mounted in the wall thereof and at the outlet side of the seat 6 has its end slidably mounted in a cap 7 9 which closes the valve chamber. The stem 8 is normally influenced'by a compression spring 10 to move the valve head 7 against its seat 6 to close the valve opening 5, said spring being interposed between the cap 9 and a piston disk 11 fast on the valve stem and being loosely slidable in a cylinder which is here shownas the outer chamber 12 of a double-ended cup 13 whose inner chamber 14 slidably receivesthe valve head 7 to retard-its closing movement onto its seat 6 and thereby prevent hammer action of the valve head. upon the seat. This double-ended cup 13 is slidably loose upon the valve stem 8, and the open end of its inner chamber 14 is arranged to abut against the partition 4 of the valve body around the valve seat 6, being normally influenced tohead.

1, 1927. Serial No. 227,711.

ward said partition by a light compression spring 15 interposed between the transverse wall 16 of the double cup and the piston disk 11. The inner chamber 14 of the cup is longer than the thickness of the valve head 7, and its side wall is formed adjacent the end edge thereof with a plurality of small transverse openings 17 which permit water to flow into the chamber 14 when the cup is seated upon the partition 4.

l/Vhen the valve is in normal closed position, the parts are located as shown in Figure 1, the valve head 7 being seated upon the seat 6 and the inner end edge of the cup 13 abutting against the partition 4, the openings 17 in the side wall of the cup being'covered by the valve head-7. Obviously, the space in the inner chamber 14 of the cup, behind the valve head 7 will be filled with water, and as the valve stem 8 is moved by opening'of the valve, the valve head 7 is moved from its seat G'and carries the cup 13 with it away from the partition 4. Free flow of water is .thus permitted from the inlet passage 2 through the valve opening 5 to the outlet passage 3. While the valve remains in open position, the spring 15 gradualy forces the cup 18 toward the partition 4, so that the transverse wall 16 of the cup rests upon the valve head 7. The proportion of the parts, however, is such that the valve head holds the cup away from the partition 4 to permit free flow of the Water through the valve opening 5.

When the valve stem moves to, close the valve, the edge of the cup 13 strikes the partition 4 before the valve head reaches the seat 6, as shown in Figure 2 of the drawings. The movement of the valve head toward the seat is then retarded, due to the fact that it must move relatively to the cup 13, and such motion in the cup 13 creates a suction between the valve head and the transverse wall 16 of the cup, which causes some of the water flowing through the side openings 17 of the T. OFFICEJ cup to pass between the valve head and the walls of the cup'into the space between the transverse wall of the cup and the valve The passages thus provided, however, are so small that movement of the valve head is necessarily slow, and accordingly the valve headapproaches its seat 6 slowly and easily a d without any material impact or hammering action. Such retardation is further increased by the pistondisk 11 having to slide in the outer chamber 12 0f the cup and force out, past itself, the water therein between the said piston disk and the transverse wall 16 of the cup. Obviously this additional retardation could be eliminated, iii desired, by omitting the outer chamber 12 of the cup 13 and utilizing the piston disk 11 merely as a spring stop or rest.

The valve stem 8 projects from the valve body 1 through a boss 18 thereon, said boss receiving packing around the stem and having a gland or nut 19 to clamp said packing. The lower part of the boss 18 provides a seattor the circular apertured portion of a bracket 20 which has opposite upwardly and inwardly curving arms 21 21 supporting at their upper ends a transverse bar 22 apertured at its middle to slidably receive the stem 8 and afford a seat for a spring 23 between said seat and an adjustable stop upon the end of the stem, which stop is shown comprising a washer 24 with a nut 25 and lock-nut 26 outside of said washer. This spring 23 acts in conjunction with the spring 10 within the cap 9 of the valve, to seat the valve head 7, and further enables the spring pressure for seating said valve head to be adjusted and regulated; for while the inside spring 10 cannot be changed or regulated,

the outer spring 23, by means of its nuts 25, 26 can be tightened or loosened to alter the tension upon the valve head 7 to seat the same. Furthermore, the outwardly bowed arms 21, 21 of the bracket 20 provide free and ready access at all times to the packing nut or gland 19 to adjust the same.

It will be noted that regulation of the spring pressure to seat the valve head 7 aii'ects the relative movement and action of said valve head and the cup 13 or its inner apertured chamber, and thus I provide a bypass valve which can be readily regulated to suit different conditions, wholly from the outside of the valve and without taking the same apart.

Various detail modifications may be made in manufacturing my invention, by those skilled in the art, Without departing from the spirit and scope of the invention, and therefore 11 do not wish to be understood as limiting myself except as required by 'the following claims when construed in the light oil the prior art.

Having thus described the invention, what I claim is:

1. A by-pass valve, comprising a body having an inlet and an outlet separated by a partition with a valve opening surrounded by a valve seat at the outlet side, a slidable valve stem projecting from the valve body at the inlet side and having a valve head fixed on said stem to cooperate with said valve seat, a spring on said stem normally seating the valve head, a cup slidable upon said valve stem providing a cylinder "for the valve head with, its open end arranged to abut said partition around said valve seat I and having lateral openings near said open end", a spring normally influencing said cup toward said partition so that said cup after being'moved away from said partition by the valve head in opening will engage said partition in advance of the valve head in closing, and an adjustable spring upon the valve stem outside the valve body for changing the action of the said spring for seating the valve head in relation to the cup spring.

2. A by-pass valve, comprising a bodyv having an inlet and an outlet separated by a partition with a valve opening surrounded by a valve seat at the outlet side, a slidable valve stem projecting from-the valve body at the inlet side and having a valve head fixed on said stein cooperate with said valve seat, a spring on said stem normally seating the valve head, a cup slidable upon said 3 valve stem providing acylinder for the valve head with its open end arranged to abut said partition around said valve seat and having lateral openings near said open end, a spring between said cup and a stop on the stem normally influencing said cup toward said partition so that said cup after being moved away from said partition by the valve head in opening will engage said partition" in advance of the valve head in closing, and an adjustable spring upon the valve stem outside the valve body for changing the action of the said spring for seating the valve head in relation to the cup spring.

8. A by-pass valve, comprising a body having an inlet and ail-outlet separated by a partition with a valve opening surrounded by a valve seat at the outlet side, a slidable valve stem projecting from the valve body at the inlet side and having a valve head fixed on said stem to cooperate with said valve seat, a spring on said stem normally seating the valve head, a cup slidableupon said valve stem providing a cylinder for the valve head with its open end arranged to abut said partition around said valve seat and having lateral openings near said open end, a spring normally influencing said cup toward said partition so that said cup after being moved away from said partition by the valve head in opening will engage said partition in advance of the valve head in closing, and an adjustable spring upon the valve stem outside the valve body which increases the closing action of said spring for seating the valve head and changes the closing action with respect to the cup spring.

l. A by-pass valvefcomprising a'body having an inlet and an outlet separated by a partition with a valve opening surrounded by a valve seat 'at the outlet side, a slidable valve stem projecting from the valve body at the inlet side and having a valve head fixed on said stem to cooperate with said valve seat, a spring on said stem normally seating the valve head, a cup slidable upon said valve stem providing a cylinder for the projects from the valve body, a bracket upon the valve body providing a support around the stem outwardly beyond said packing, and a spring upon the stem between said support'and an adjustable stop on the stem for changing the action of the valve-seating spring relative to the cup-seating spring.

5. A by-pass valve, comprising a body having an inlet and an outlet separated by a partition with a valve opening surrounded by a valve seat at the outlet side, aslidable valve stem projecting from the valve body at the inlet side and having a valve head fixed on said stem to cooperate with said valve seat, a spring on said stem normally seatingrthe valve head, a cup slidable upon said valve stem providing a cylinder for the valve head with its open end arranged to abut said partition around said valve seat 'andhaving lateral openings near said open end, a spring normally influencing said cup toward said partition so'that said cup after being moved away from said partition by the valve head in opening will engage said partition in advance of the valve head in closing,

.a packing boss and gland upon the outside of the valve 'bodyaround said stem, a bracket mounted upon said boss next the valve body and having opposite outwardly bowed arms providing access to the packing gland, a' cross-bar upon the ends of sa1darmsapertured to receive the stem, an adjustable nut upon the outer end of the stem, and a spring on said stem between said nut and bar for changing the action of the valve-seating spring in relation to the cup-seating spring.

' EDWARD MULLER. 

